Series DC motors are a group of self-excited DC motors in which the field coil is connected in series to the armature winding and thus a higher current passes through it. A series DC motor mission is to turn the electrical energy into mechanical one based on electromagnetic law.
What is series motor definition?
A series motor is a direct current motor that has two windings that are in series, with the same current flowing through each. … The series motor provides high starting torque and is able to move very large shaft loads when it is first energized.
Where are DC series motors used?
⇒ DC series motors are used where high starting torque required. These motors are only used where the variation of speed is possible. series motors are not suitable for constant speed applications. ⇒ DC series motor is used in a vacuum cleaner, traction systems, sewing machines, cranes, air compressors etc.
What is a series wound DC motor?
When the armature windings and field windings are connected in series, the motor is referred to as a “series wound” DC motor. Being connected in series means the current through the armature and the field windings is equal (Itotal= Ia= If), which allows the motor to draw a significant amount of current.
What are the characteristics of a dc series motor?
Characteristics of a DC Series Motors:
- Speed-Current Characteristic:
- Since on no load the series motor attains dangerously high speed, which causes heavy centrifugal force resulting in the damage of machine, series motors are not suitable for the services:
- Torque-Current Characteristic:
- Speed-Torque Characteristic:
What are the two main parts of DC motor?
DC motors include two key components: a stator and an armature. The stator is the stationary part of a motor, while the armature rotates. In a DC motor, the stator provides a rotating magnetic field that drives the armature to rotate.
What are the 3 types of DC motors?
Main Types of DC Motors
- Permanent Magnet DC Motors. The permanent magnet motor uses a permanent magnet to create field flux. …
- Series DC Motors. In a series DC motor, the field is wound with a few turns of a large wire carrying the full armature current. …
- Shunt DC Motors. …
- Compound DC Motors.
Why starters are required in a DC motor?
Starters are used to protect DC motors from damage that can be caused by very high current and torque during startup. They do this by providing external resistance to the motor, which is connected in series to the motor’s armature winding and restricts the current to an acceptable level.
Which DC motor is best?
Series wound DC motors are best for applications that require high startup torque, without the need for speed regulation. Like a shunt motor, as a load is applied to a DC series motor, the motor speed decreases, which reduces the back EMF and increases the net voltage.
What are the applications of DC motor?
- Blowers and fans.
- Centrifugal and reciprocating pumps.
- Lathe machines.
- Machine tools.
- Milling machines.
- Drilling machines.
Can a DC motor run on AC?
DC cannot produce varying flux as it is constant and uni directional. But DC motors may run on AC supply . The DC series motor can run on both AC &DC supply . It is also called as an Universal motor.
How do I know if a motor is AC or DC?
Look for the stator core construction and rotor. If there is no commutator, then it is a AC motor. If there is a commutator and brushes, it may be either a DC motor or an AC commutator motor (Universal motor).
Why is the DC motor preferred over AC motor?
AC motors are generally considered to be more powerful than DC motors because they can generate higher torque by using a more powerful current. However, DC motors are typically more efficient and make better use of their input energy.
What are the advantages of DC series motor?
Advantages of DC Series Motor
- Dc series motor have good accelerating torque.
- Dc series motor have a relatively huge starting torques.
- Dc series motor delivers high torque during an overload.
- The dc series motor draws less current and power from the source compared to a shunt or compound motor.
How does a DC motor start?
So, a DC motor is started by using a starter. There are various types of dc motor starters, such as 3 point starter, 4 point starter, no-load release coil starter, thyristor controller starter etc. The basic concept behind every DC motor starter is adding external resistance to the armature winding during starting.
How does a dc series motor work?
A series DC motor converts electric energy to mechanic energy based on the electromagnetic principle. In this type of DC motor, a power supply terminal sits at one end of the armature and field coils. … This strong torque, in turn, spins the armature and produces the target mechanic energy.